Centrifugal separator



July 10, 1945. w. H. BATH CENTRIFUGAL SEPARATOR' Filed July 6, 1945 2 Sheets-Sheet 1 y 1945- w. H. BATH CENTRIFUGAL SEPARATOR Filed July 6, 1943 2 Sheets-Sheet; 2

' M/WEss Patented July 10, 1945 in n n 2,380,014 n W CENTRIFUGAL SEPARATOR 1 H Wilmer H. Bath, WestConshohockenjPa assign or to The Sharples" Corporation,Philadelphia, l 1 Pa,acorporationofDelaware V H Application July 6, 1943, SerialNo. 493,651

The present invention pertains to centrifugal separators and is concerned with de-. 1

flector and accelerator arrangements forcontrolling flow of liquid through such a separator. It it applicable to centrifugal separators of both these-called separatori type in whichtwo or I more liquidsare separated from each other and separately discharged from the influence of cenliquid by the aidjof wings extending longitudinally of therotor from a zone beyond the zone offdefiection toward the zone of discharge from the rotor. f

It is frequently desirable, inconnection with a centrifugal separator embodying a deflectori and a longitudinally extending accelerator as described abovle, that the deflector be secured to the accelerator member This is particularly true in cases in which a conical deflector is placed in the path of the injected liquid in orderto deflect this liquid with aminimum of turbulence. commerable difficultyhas been encountered in such arrangements in attempting to aflix the deflector member. to the accelerator in a secure manner, so that these members do not become dislodged from each other in use of the machine-and in removal of the unit consisting of the deflector and-acceleratorfor cleaning. A feature of the present invention consists in the fact that it provides a thoroughly satisfactory solution of this problem. l l k: M

'Ijhe nature'of the problem and of the solution provided bythe present; invention" will be more evident'gfrom a reading of the following-specification in the light of the attached drawings, in which," M '0 Figure 1 is a cross sectional View, partly in side elevation, illustrating the invention as'appliedto a centrifugal separator designed to effect centrif. gation' and separate discharge of a mixturecontainingaplurality of liquids, j l Figuregz is an enlarged detailed view, partly in was e i n..andira in e vat on; llji'hi eii the deflector and accelerator'ofthe invention-and trifugalforce and of the'clarifiertype in which f ,3 Claims. (on. 233 23) the art of themanner of securing these members toeach other,' i l l l V Figure 3 is a detailed side elevation of one wing ofthe accelerator member in apreliminary stage of the manufacturing process, I a it i 1 Figure 4 is a cross section through-the deflector ofttheinvention, j j g n Figure 5 is aside elevationpon.anaenlarged accelerator together;

Figure 6 is a cross sectionjon the Figure5,

scale, of a clip used in securing thedeflector and line 6-6 Figure 7 is a crOsssection Qn the line I -"l ef Figure 2, and

Figure 8 is a cro s section on the li esa of Figure 2. g l I Referring to the drawingsby reference characters, the centrifugal separator mayinclude a frame l U'having a casing I I for enclosure of the rotor of the machine. under treatmentis fed to the rotor 20,fwhich rotates within the casing] I. The feed mea'nsmay be of conventional character, and include a conduit l2 which is attached to a feed'nozzle I4 by means of a removable connection l3, Thefeed and bearingfeatures of the lowerendof the rotor may be of any desired type suchas the'typeillustrated in my priorfPatent 1,750,154; dated March 11, 1930, for "Centrifugal'rnachinep After being injected into the rotor, the mixtureof liqf uids strikes a deflector cone l5 secured to the lower end of an accelerator member l6, thisaccelerator memberhe'xtending upwardly from the longitudinal zoneof the cone l5tothe upper end 1 of the rotor. The accelerator member maym:

elude a plurality of jradially extending wings H i I having flanges securedto each other in the central portion of the rotor by any suitable means} such as rivets l8., The accelerator wings are provided withopenings toward theirlower ends as indicated at lg lforfmanipulation by a" suitable tool'in withdrawingthe acceleratorand deflector assembly from the rotor for cleaning. Theupper end of the rotor 2| is secured through its neck 22 to a drive spindle 23 for rotatingthejrotor. The separated liquid efiluents are discharged into covers and 25;respectively The features of the centrifugalseparator described above are of well known design and form no part of the present invention, since thisinvention relates to] the method of-securing the deflector l5 to the accelerator l6. In priorart machines of thistype," it hasbeen customary to affix the deflector directly to the accelerator, as by Welding or soldering. Such a'type oi afiix- The mixture r liquids ment is relatively insecure, however, and is subject to special objection when incorporated in a machine having the features described above by from consideration'of Figures 2 to' 8 rof' the :dra=wings, which illustrate in greater detail the method of securement of the deflector to the accelerator in the practice of the invention. It is believed that the nature of the connectionby which the results of the present invention zare attained will be best apparent from a ,preliminary consideration of Figures 3 to 50f the drawings and the mannersin which the parts therein illustrated are secured to each other.

:3 illustrates :one wing H -:of the 'accelerator assembly. The upper portion-ZB of this wing is somewhat wider than'the .radius of 'the rotor and the lower portion .2 'I is :somewhatnarrower than that radius. A slot 28 is :provided extending outwardly from the zone of juncture of these upper and lower portions, and a pinrality of holes 29 are provided at spaced intervals toward the inner edge 3010f the wing H for the securement of rivets, one line of these rivet holes .being 'spaced from the-outer edge 32l a-rdistance less than the radius of the rotor and another line of :these rivet holes being spaced from 1 that edge a distance greater than the radius of the rotor, YA rivet hole -'or holes 32 is :(are) for-med in a portion .of the lower end 21 of the wing spaced outwardly from the ,innertedge -33 of that portion.

After the respective wings are manufactured accordance with the .above description, the inner ends .of the upper portions 2-6 of these wings are bent ,at an angle *to the main bodies thereof on 'a. line X-X spaced from the outer.

edge .31 a distance equal to the radius of .the rotor. The .angle of the iflange formed by this bending operation depends upon the number of wings to be'employed in the accelerator unit. of three wings are to be employed, the angle will be.12,.and if four wings are to be employed as illustrated, the angle will be 909. .After the wings are formed :and flanged. asdescribed .above, .the deflector member I is positioned with respect to one of them. As illustrated .in Figure 4, this deflector member-comprises .a conical Ybase portion 34 connected by an extension or stem .35 with -a laterally extending projection or .disc .ili. The edge of the disc .36 is shaped to .flt snugly within the slots .28. In assembling the deflector and accelerator, the projection or disc 36 of the deflector J5 isflttedinto the slot 2B of the accelerator, with the conical portion of the deflector extending downwardly therefrom. The

companion accelerator wings are then fitted upon the projection ordisc. 36 with their respective flanges 3'! in abutting relation to the inner edges of companion wings as illustrated vin Figure J8 of the drawings, and these accelerator wings are then secured to each other by rivet- .mg as illustrated inthat figure, with the projec- *tion or disc 36 of the deflector extension 35 securely held in position within the :SlOtS 2B.

, It will be seen that, by the type of securement described above, the deflector ris rtgidl-y held by .each of the reinforcing members constitutes an angular reinforcing member 38 having arms 42 rforming an angle with each other similar to the angle formed by the flanges 31 of the wings I! withrespect to their main body portions. The

, respective arms of these members 38 are each provided with rivet holes 39, and the apex of the angle is. curved or cut away at 40 so that these members, when assembled together about the stem or extension snugly surround that member. vEach arm of these members .38 is 30- vided with a. portion All adapted to abut the upper surface 43 of the deflector .15 when the, parts are assembled together as illustrated in Fi 122.

assembling the reinforcing members 38 with the assembled accelerator and deflector, af-ter riveting the accelerator. wings together .as described above, these reinforcing members are positioned about the stem 35 with their portions 40 abutting the outer surface of. that stem, with their portions 4.! abutting the .upper surface 43 of the deflector l5, and with the rivet holes. ,3! in their respective arms in line with correspond ing rivet holes 3'2 in the lower portions. 21 .of the accelerator wings. are .then riveted to .the accelerator wings through the rivet holes 32 and 33,, as illustrated in Figure '7 of the; drawings.

The relationship between the circumference of thedisc L36 andlthe circumference of thede'flc tor base portion, 34 is sometimes important, and one feature of the present invention consists in the provision of a disc '36 having a larger'cir cumference than the circumference of the deflector surface, It ,issometimes 'desirableto ,provide a deflector surface of suffi'c'iently small "diameter to prevent'projection or the outer surface of the deflector into the rotating body of liquid in "the rotor; i. e., to provide a deflectorwhose circumference does-not project outwardly to a 'zone as far from the center of the rotor-as the dam controlling discharge of the lightest liquid from the rotor. that a liquid seal b providedprojecting from 'a central portion of the rotor to a zone within the body of liquid rotating within the rotor. In order to provide such a seal, the di=sc 36 is designed to dip into the body of liquid rotating within the rotor; i. -e., this disc has a circumferenoe'extending outwardly within the rotor to a. depth beyond the zone :of the dam controlling discharge of the lightest liquid from the rotor. :Such .a feature his not desirable tornecessary in connection with all casesof centriifugation, however, and while it nfiorms one :aspect rotmy mven- :tion, the invention is not limited thereto.

While the securement of the accelerator wings 'to each other and to the reinforcing members has been described above as accomplished through riveted connections, it will be evident that welding may :be substituted for riveting in accomplishing this securement. While w have described the invention as specifically applied to a deflector having-a conic-a1 deflectingsurface, it willbe .evident that the invention is applicable to secure- The reinforcing members It is also frequently desirable l ment of deflector and accelerator members to each other regardless of the specific shape of the deflector surface. Similarly, the invention is not limited to any specific form of longitudinally extending accelerator member, as it may be applied in connection with accelerator members having varying shapes or varying number of wings or accelerator blades.

Various other modifications are possible within the scope of the invention, and I do not therefore Wishto be limited except by the scope of the following claims.

I claim: i

1. In a centrifugal separator, the combination comprising a centrifugal rotor, means for injecting liquid into the rotor, a deflector member in the path of the injected liquid, a longitudinally extending accelerator extending beyond saiddeflector in the direction of flow of liquid through said rotor, said accelerator comprising a plurality, of wings, an extension from said deflector member interconnecting the sa'me with said ac-v celerator, and a laterallyextending enlargement on a portion of said extension secured within a corresponding laterally extending recessed portion of said accelerator member, said accelerator wings being secured together in their central porsaid deflector in the direction of flow of liquid through said rotor, said accelerator comprising a plurality of wings, an extension from said deflector member interconnecting the same with said accelerator, a circular disc constituting a laterally extending enlargement on said extension, said circular disc being mounted in a corresponding laterally extending recessed portion of said accelerator member, and said accelerator wings being secured together in their central portions and thereby clamping said disc therebetween.

3. In a centrifugal separator, the combination comprising a centrifugal rotor, means for injecttions and thereby clamping said enlargement therebetween.

2. In a centrifugal separator, the combination comprising a centrifugal rotor, means for injecting liquid into the rotor, a deflector member in the path of the injected liquid, a longitua dinally extending accelerator extending beyond ing liquid into the rotor, a deflector member in the path of the injected liquid, a longitudinally extending accelerator extending beyond said deflector in the direction of flow of liquid through said rotor, said accelerator comprising a plurality of wings, an extension from said deflector member interconnecting the same with said accelerator, a circular disc constituting a laterally ex 7 tending enlargement on said extension, said circular disc being mounted in a corresponding laterally extending recessed portion of said accelerator member, and said accelerator wings being secured together in their central portions and thereby clamping said disc therebetween in said recessed portion, said disc extending outwardly from a central portion of the rotor to a zone radially beyond the outermost portion of said deflector member.

WILMER H. BATH. 

